Police and fire crews have been called to Auckland's busy Queen St, where a protester has chained himself to a building's awning several metres above street level.

Authorities were called to the bottom of Queen St - which intersects with Customs St West - about 11.30am after reports of a person on a building.

Half an hour later, authorities were still there trying to get the protester down.

A police spokesman confirmed they were dealing with a man who had positioned himself just above the Swarovski jewellery store.

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"He's got some banners and he's sitting on the awning,'' the spokesman said.

It is understood he is protesting for human rights in Chile.

At least two fire trucks and a number of police officers are at the scene.